Product Description Model NO.: RY002 Feature: Long Time Materials Shape: Pipe Maximum Voltage: <10kv Trademark: RY Origin: China Refractoriness (℃): 1770< Refractoriness< 2000 Type: Refractory Material Material: Alumina Cement Color: Ivory and White Specification: 99% Alumina 99.7% Alumina Ceramic Tube / rod 1800 degree C
High purity ceramic alumina tube parameters:
1.Material : High purity alumina oxide 95%-99%
2.Application:    Mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial        furnace of Alumina Ceramic tube.   Especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout,      military project etc industry of Alumina ceramic tube. 3.Good smooth and high strength
4. Diameter from 1mm to 120mm,Length from 100mm to 2000mm, 
   multi bores tubes can be made. 
5. Max working temperature 1800.
6. Out surface can be grinded drilling hole to make tight tolerance and right instillation. 
7.Large quantity in stock makes fast delivery and competitive prices.
8.OEM and ODM are welcomed 
Main performance index about alumina ceramic tube:

Project		Test the condition	Unit	99 porcelain	95 porcelain	Talc porcelain
Backbone				99%AL2O3	95%AL2O3	MgO.SiO2
Physical property	Density of volume	Normal atmospheric temperature	g/cm3	3.8	3.6	2.8
	Airtight	Normal atmospheric temperature	.	.Pass	Pass	-
	Absorbing water rate	Normal atmospheric temperature	%	0	0	0
	Temperature that frit		°C	1800	1650	1350
Mechanical performance	Rockwell hardness	Normal atmospheric temperature	HRA	88	86	76
	Resist the intensity of turning back	Normal atmospheric temperature	Mpa	350	320	150
	Compression strength	Normal atmospheric temperature	Mpa	1300	1200	900
Hot performance	Use temperature at most		°C	1700	1600	1200
	Heat resistant shaking	20O°C-1100O°C	10Num	Pass	Pass	Pass
	Hot coefficient of expansion	20O°C-80O°C	×10-6mm/°C	6.5-8.5	6.5-8.0	5.0-6.2
	Heat-conduction rate	25°C	W/m.k	29	25	2.9
		300°C	W/m.k	18	13	2
Dielectric constant	The medium lossing	1MHz2O°C	×10-4	≤2.5	≤4	≤8.0
	The angle tangent is worth	1MHz8O°C	×10-4	≤3.5	≤4.2	-
	Dielectric strength	Normal atmospheric temperature	KV/mm	15	16	20
	Dielectric constant	1MHz2O°C		9-10.5	9-10	≤7.5
	Resistivity of volume	2O°C	Ω.cm	>1012	>1012	>1013
		10O°C	Ω.cm	1012-1013	1012-1013	1010-1011
		30O°C	Ω.cm	>1012	3.1×109	5×108

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